 
Summary: On the DaĆnity of the
ag variety in type B 2
Henning Haahr Andersen
Matematisk Institut, Aarhus Universitet
DK 8000 Aarhus C
email: mathha@imf.au.dk
and
KANEDA Masaharu
5588585 Osaka Sumiyoshiku Sugimoto
Osaka City University, Graduate School of Science
Department of Mathematics
email: kaneda@sci.osakacu.ac.jp
January 26, 2000
Let X be a smooth variety over an algebraically closed eld k, and let D X be the
sheaf of dierential operators on X. Then X is said to be DaĆne i the following two
conditions hold: (i) for any D X module M quasicoherent over O X the natural morphism
D
X
DX (X) M(X) !M is epic, (ii) H i (X; D X ) = 0 for i > 0.
In characteristic 0 the
ag variety for a semisimple algebraic group is known to be D
